Submission #378002

#	Time	Username	Problem	Language	Result	Execution time	Memory
378002		meperdonas203	Traffic (IOI10_traffic)	C++17	100 / 100	1093 ms	149356 KiB

traffic

#include "traffic.h"
#include <bits/stdc++.h>
#include <vector>
using namespace std;
vector <int> adjacencia[1000010];
long long int sub_arb[1000010];
long long int menor=INT_MAX;
int ans=0;
int dfs(int nodo,int anterior){
  for(int i=0;i<adjacencia[nodo].size();i++){
    if(adjacencia[nodo][i]!=anterior){
      sub_arb[nodo]+=dfs(adjacencia[nodo][i],nodo);
    }
  }
  return sub_arb[nodo];
}
void respuesta(int nodo,int anterior){
  int maximo=sub_arb[adjacencia[nodo][0]];
  int hijo=adjacencia[nodo][0];
  for(int i=0;i<adjacencia[nodo].size();i++){
    if(sub_arb[adjacencia[nodo][i]]>maximo){
      hijo=adjacencia[nodo][i];
      maximo=sub_arb[adjacencia[nodo][i]];
    }
  }
  if(maximo<menor){
    ans=nodo;
    menor=maximo;
  }
  if(hijo==anterior){
    return ;
  }
  sub_arb[nodo]-=sub_arb[hijo];
  sub_arb[hijo]+=sub_arb[nodo];
  respuesta(hijo,nodo);
  return;
}
int LocateCentre(int N, int pp[], int S[], int D[]) {
  if(N==1){
    return 0;
  }
  for(int i=0;i<N;i++){
    sub_arb[i]=pp[i];
  }
   for(int i= 0;i<=N-2;i++){
     adjacencia[S[i]].push_back(D[i]);
     adjacencia[D[i]].push_back(S[i]);
   }
   dfs(0,0);
   respuesta(0,0);
   return ans;
}

Compilation message (stderr)

traffic.cpp: In function 'int dfs(int, int)':
traffic.cpp:10:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |   for(int i=0;i<adjacencia[nodo].size();i++){
      |               ~^~~~~~~~~~~~~~~~~~~~~~~~
traffic.cpp: In function 'void respuesta(int, int)':
traffic.cpp:20:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for(int i=0;i<adjacencia[nodo].size();i++){
      |               ~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 25 / 25